$K^0(\bar{K^0})$ Production in Two-Photon Processes at TRISTAN

TL;DR

This study measures the production of neutral kaons in two-photon collisions at TRISTAN, distinguishing between direct and resolved-photon processes for the first time with high-statistics data.

Contribution

It provides the first separation of cross sections for resolved-photon and direct processes in $K^0$ production at TRISTAN.

Findings

Separated cross sections for resolved and direct processes.

High-statistics $K_s$ samples obtained.

First measurement of this kind at TRISTAN.

Abstract

We have carried out an inclusive measurement of $K^0(\bar{K^0})$ production in two-photon processes at TRISTAN. The mean $\sqrt{s}$ was 58 GeV and the integrated luminosity was 199 pb$^{-1}$. High-statistics $K_s$ samples were obtained under such conditions as no-, anti-electron, and remnant-jet tags. The remnant-jet tag, in particular, allowed us, for the first time, to measure the cross sections separately for the resolved-photon and direct processes.